package tree.easy;

import tree.TreeNode;

/**
 * 104. 二叉树的最大深度
 */
public class MaxDepth {

    public static void main(String[] args) {
        MaxDepth maxDepth = new MaxDepth();
        System.out.println(maxDepth.maxDepth(TreeNode.ROOT));
    }

    public int maxDepth(TreeNode root) {
        if (root == null) {
            return 0;
        }
        return Math.max(maxDepth(root.left), maxDepth(root.right)) + 1;
    }
}
